Hi Magz,
Quote Originally Posted by magz View Post
260113003435668 () - 12 visits to 5 different pages within one category (3 products and 2 cat/subcat pages), first 11 visits within a 4-and-a-half minute period, the 12th about an hour later; none of the links had ?zenid=... parameter as part of the url

260131100251939 () - 26 visits, all within a 6-and-a-half minute period, to a whole bunch of different pages (mostly within catalog, but not exclusively); first link has no ?zenid= parameter, the other 25 all have an identical session id
Can You see the access logs for that date and time? What IP address?

Quote Originally Posted by magz View Post
Any idea what all this could mean?
I think that the situation is very strange and needs debugging and analysis.